package cn.itcast.bos.web.action.base;

import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

import javax.persistence.criteria.CriteriaBuilder;
import javax.persistence.criteria.CriteriaQuery;
import javax.persistence.criteria.Join;
import javax.persistence.criteria.JoinType;
import javax.persistence.criteria.Predicate;
import javax.persistence.criteria.Root;

import org.apache.commons.lang3.StringUtils;
import org.apache.struts2.convention.annotation.Action;
import org.apache.struts2.convention.annotation.Namespace;
import org.apache.struts2.convention.annotation.ParentPackage;
import org.apache.struts2.convention.annotation.Result;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.context.annotation.Scope;
import org.springframework.data.domain.Page;
import org.springframework.data.domain.PageRequest;
import org.springframework.data.domain.Pageable;
import org.springframework.data.jpa.domain.Specification;
import org.springframework.stereotype.Controller;

import cn.itcast.bos.domain.base.Courier;
import cn.itcast.bos.service.base.CourierService;

import com.opensymphony.xwork2.ActionContext;
import com.opensymphony.xwork2.ActionSupport;
import com.opensymphony.xwork2.ModelDriven;

@ParentPackage("json-default")
@Namespace("/")
@Controller
@Scope("prototype")
public class CourierAction extends ActionSupport implements ModelDriven<Courier>{

	// 驱动模型
	private Courier courier=new Courier();
	
	@Override
	public Courier getModel() {
		
		return courier;
	}
	
	// 注入Service
		@Autowired
		private CourierService courierService;
	
	// 添加快递员的方法
	@Action(value="courier_save",results={@Result(name="success",location="./pages/base/courier.html",type="redirect")})
	public String save(){
		courierService.save(courier);
		return SUCCESS;
	}
	
	// 属性驱动
	private int page;
	private int rows;

	public void setPage(int page) {
		this.page = page;
	}
	public void setRows(int rows) {
		this.rows = rows;
	}
	
	// 分页查询
	@Action(value="courier_pageQuery",results={@Result(name="success",type="json")})
	public String pageQuery(){
		// 封装pageable对象
		Pageable pageable=new PageRequest(page-1, rows);
		
		// 根据条件 构造Specification 条件查询对象
		Specification<Courier> specification=new Specification<Courier>() {
			
			@Override
			/**
			 * 条件查询方法
			 * Root 参数的获取条件的表达式
			 * query 构造简查询单条件返回 
			 * cd 构造复杂查询条件
			 */
			public Predicate toPredicate(Root<Courier> root, CriteriaQuery<?> query,
					CriteriaBuilder cb) {
				List<Predicate> list=new ArrayList<Predicate>();
				
				if(StringUtils.isNoneBlank(courier.getCourierNum())){
					Predicate p1 = cb.equal(root.get("courierNum").as(String.class),
							courier.getCourierNum());
					list.add(p1);
				}
				if(StringUtils.isNoneBlank(courier.getCompany())){
					Predicate p2 = cb.like(root.get("company").as(String.class),
							"%"+courier.getCompany()+"%");
					list.add(p2);
				}
				if(StringUtils.isNoneBlank(courier.getType())){
					Predicate p3 = cb.equal(root.get("type").as(String.class),
							courier.getType());
					list.add(p3);
				}
				Join<Object, Object> standardRoot = root.join("standard",JoinType.INNER);
				if(courier.getStandard()!=null&&
						StringUtils.isNoneBlank(courier.getStandard().getName())){
					Predicate p4 = cb.like(standardRoot.get("name").as(String.class),
					"%"+courier.getStandard().getName()+"%");
					list.add(p4);
				}
				return cb.and(list.toArray(new Predicate[0]));
			}
		};
		
		Page<Courier> pageData=courierService.findPageData(specification,pageable);
		
		Map<String,Object> result=new HashMap<String,Object>();
		
		result.put("total", pageData.getTotalElements());
		result.put("rows", pageData.getContent());
		
		ActionContext.getContext().getValueStack().push(result);
		
		return SUCCESS;
	}
	
	private String ids;
	
	public void setIds(String ids) {
		this.ids = ids;
	}
	@Action(value="courier_delBatch",results={@Result(name="success",location="./pages/base/courier.html",type="redirect")})
	public String delBatch(){
		
		String[] idArray=ids.split(",");
		
		courierService.delBatch(idArray);
		return SUCCESS;
	}
	
}
